Surah Al-An'am — Ayah 149 (6:149)
قُلۡ فَلِلَّهِ ٱلۡحُجَّةُ ٱلۡبَٰلِغَةُۖ فَلَوۡ شَآءَ لَهَدَىٰكُمۡ أَجۡمَعِينَ ١٤٩
English translation (Saheeh International)
Say, "With Allāh is the far-reaching [i.e., conclusive] argument. If He had willed, He would have guided you all."
Brief commentary
Say, O Messenger, to the idolaters: If you only have these weak arguments, then Allah has a decisive argument against which the excuses you present hold no weight and before which the doubts that you cling to will disappear. If Allah had willed to guide all of you to the truth, O idolaters, He would have done so.